Plunger type metering pump

Abstract

The utility model discloses a plunger type metering pump which comprises a transmission case, a pump body is fixedly installed on the left side of the transmission case, an oil cavity is formed in the pump body, a working cavity is formed in the pump body, a driving assembly is arranged in the transmission case, and a connecting rod is arranged in the transmission case through the driving assembly. A piston is fixedly installed at the left end of the connecting rod, a diaphragm is arranged in the working cavity, a pressure gauge is fixedly installed at the top of the pump body, an alarm is fixedly installed at the top of the pump body, a water inlet assembly is arranged at the top of the working cavity, a safety pipe is fixedly installed at the bottom of the working cavity, and a moving assembly is arranged in the safety pipe. A blocking plug is arranged in the safety pipe through a moving assembly. The diaphragm can be conveniently and timely reminded of a worker that the diaphragm is damaged, and an oil body can be timely blocked when the diaphragm is damaged, so that the oil body is prevented from entering an external pipeline and polluting liquid in the external pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, in particular to a plunger type metering pump. Background Art

[0002] A metering pump, also known as a constant-flow or proportional pump, is a specialized positive displacement pump used to transport liquids, capable of meeting the stringent requirements of various process flows. Its flow rate can be infinitely adjusted from 0-100%. A metering pump is a type of fluid conveying mechanism, distinguished by its ability to maintain a constant flow rate independent of discharge pressure. Metering pumps can simultaneously perform conveying, metering, and regulation functions, streamlining production processes. Using multiple metering pumps, several media can be mixed and introduced into the process flow in precise proportions. Due to their exceptional performance, metering pumps are now widely used in various industries, including the petrochemical, pharmaceutical, and food industries.

[0003] During the use of the existing plunger metering pump, the staff cannot timely understand the pressure changes inside the oil chamber of the shell. When the diaphragm is damaged, the staff cannot timely understand the damage of the diaphragm, which easily causes the oil in the oil chamber to flow out from the water outlet pipe, affecting the use. Therefore, the utility model provides a plunger metering pump. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a plunger-type metering pump for solving the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A plunger metering pump comprises a transmission box, a pump body is fixedly installed on the left side of the transmission box, an active chamber is opened inside the pump body, an oil chamber is opened inside the pump body, a working chamber is opened inside the pump body, a driving assembly is provided inside the transmission box, a connecting rod is provided inside the transmission box through the driving assembly, a fixed block is slidably connected to the surface of the connecting rod, and the fixed block is fixedly connected to the active chamber, a piston is fixedly installed on the left end of the connecting rod, a diaphragm is provided inside the working chamber, a pressure gauge is fixedly installed on the top of the pump body, a detection probe on the pressure gauge extends into the oil chamber, an alarm is fixedly installed on the top of the pump body, a water inlet assembly is provided on the top of the working chamber, a safety tube is fixedly installed on the bottom of the working chamber, a moving assembly is provided inside the safety tube, a blocking plug is provided inside the safety tube through the moving assembly, and a water outlet assembly is provided at the bottom of the safety tube.

[0007] Preferably, the driving assembly includes a driving motor arranged on the top of the transmission box, a rotating shaft is fixedly installed on the output end of the driving motor, a turntable is fixedly installed on the bottom end of the rotating shaft, a slider is fixedly installed on the top of the turntable, a circular slide rail is slidably connected to the surface of the slider, and the circular slide rail is fixedly connected to the transmission box, a transmission rod is hinged to the bottom of the turntable, and the transmission rod is hinged to the connecting rod.

[0008] Preferably, the water inlet assembly includes a water inlet pipe arranged at the top of the working chamber, and the water inlet pipe is provided with a water inlet one-way valve.

[0009] Preferably, the moving assembly includes an electric push rod and a movable rod arranged inside the safety tube, the output end of the electric push rod is fixedly connected to the blocking plug, the movable rod is slidingly connected to the safety tube, and the movable rod is fixedly connected to the blocking plug.

[0010] Preferably, the water outlet assembly includes a water outlet pipe arranged at the bottom of the safety pipe, and a water outlet one-way valve is provided on the water outlet pipe.

[0011] Preferably, a mounting plate is provided inside the oil chamber, a column is slidably connected inside the mounting plate, a spring is fixedly mounted on the surface of the column, and the spring is fixedly connected to the mounting plate.

[0012] Preferably, there are multiple sliders, and the multiple sliders are distributed in a circular array.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the plunger-type metering pump can detect the pressure change in the oil chamber through the pressure gauge. When the pressure in the oil chamber is abnormal, it indicates that the diaphragm is damaged, so that the alarm is activated and the alarm sounds an alarm. At the same time, the moving component drives the blocking plug to the left to a suitable position, thereby blocking the liquid and oil flowing into the safety pipe, so that the staff can be reminded in time that the diaphragm is damaged, and the oil can be blocked in time when the diaphragm is damaged to prevent the oil from entering the external pipeline and contaminating the liquid in the external pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional stereogram of the present utility model;

[0015] Figure 2 This is a front cross-sectional view of the structure of the utility model;

[0016] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 It is a bottom sectional view of the structure of the utility model.

[0018] In the figure: 1. Transmission box; 2. Pump body; 3. Movable chamber; 4. Oil chamber; 5. Working chamber; 6. Drive motor; 7. Rotating shaft; 8. Turntable; 9. Slider; 10. Circular slide rail; 11. Transmission rod; 12. Connecting rod; 13. Fixed block; 14. Piston; 15. Diaphragm; 16. Mounting plate; 17. Column; 18. Spring; 19. Pressure gauge; 20. Alarm; 21. Water inlet pipe; 22. Water inlet check valve; 23. Safety pipe; 24. Electric push rod; 25. Movable rod; 26. Blocking plug; 27. Water outlet pipe; 28. Water outlet check valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Reference Figure 1-4A plunger metering pump includes a transmission box 1, a pump body 2 is fixedly installed on the left side of the transmission box 1, an active chamber 3 is opened inside the pump body 2, an oil chamber 4 is opened inside the pump body 2, a working chamber 5 is opened inside the pump body 2, a driving assembly is provided inside the transmission box 1, and a connecting rod 12 is provided inside the transmission box 1 through the driving assembly. The driving assembly includes a driving motor 6 arranged on the top of the transmission box 1, a rotating shaft 7 is fixedly installed on the output end of the driving motor 6, a turntable 8 is fixedly installed on the bottom end of the rotating shaft 7, a slider 9 is fixedly installed on the top of the turntable 8, a circular slide rail 10 is slidably connected to the surface of the slider 9, and the circular slide rail 10 is fixedly connected to the transmission box 1, the number of sliders 9 is multiple, and the multiple sliders 9 are distributed in a circular array, so that the turntable 8 can rotate more stably. A transmission rod 11 is hinged at the bottom of the turntable 8, and the transmission rod 11 is hinged to the connecting rod 12 so that the connecting rod 12 can move back and forth. A fixed block 13 is slidably connected to the surface of the connecting rod 12, and the fixed block 13 is fixedly connected to the movable chamber 3. A piston 14 is fixedly installed on the left end of the connecting rod 12, a diaphragm 15 is provided inside the working chamber 5, a mounting plate 16 is provided inside the oil chamber 4, a column 17 is slidably connected inside the mounting plate 16, a spring 18 is fixedly installed on the surface of the column 17, and the spring 18 is fixedly connected to the mounting plate 16, a pressure gauge 19 is fixedly installed on the top of the pump body 2, and the detection probe on the pressure gauge 19 extends into the oil chamber 4. An alarm 20 is fixedly installed on the top of the pump body 2, and a water inlet assembly is provided on the top of the working chamber 5. The water inlet assembly includes an assembly provided on the working chamber 5. The water inlet pipe 21 at the top of the chamber 5 is provided with a water inlet one-way valve 22, so that the liquid in the external channel can only enter the working chamber 5 from the water inlet component and cannot flow back. A safety pipe 23 is fixedly installed at the bottom of the working chamber 5, and a moving component is provided inside the safety pipe 23. A blocking plug 26 is provided inside the safety pipe 23 through the moving component. The moving component includes an electric push rod 24 and a movable rod 25 provided inside the safety pipe 23. The output end of the electric push rod 24 is fixedly connected to the blocking plug 26, and the movable rod 25 is slidably connected to the safety pipe 23, and the movable rod 25 is fixedly connected to the blocking plug 26, so as to provide driving force for the movement of the blocking plug 26, so that the blocking plug 26 can be moved to the left when the diaphragm 15 is damaged, thereby facilitating the blocking of the oil body. The bottom of the safety pipe 23 is provided with a water outlet assembly, which includes a water outlet pipe 27 provided at the bottom of the safety pipe 23. The water outlet one-way valve 28 is provided on the water outlet pipe 27, so that the liquid can only be discharged from the water outlet assembly and cannot flow back. The plunger metering pump can detect the pressure change in the oil chamber 4 through the pressure gauge 19. When the pressure in the oil chamber 4 is detected to be abnormal, it indicates that the diaphragm 15 is damaged, so that the alarm 20 is started, and the alarm 20 alarms. At the same time, the moving assembly drives the blocking plug 26 to move to the left to a suitable position, thereby blocking the liquid and oil flowing into the safety pipe 23, so that the staff can be reminded in time that the diaphragm 15 is damaged, and the oil can be blocked in time when the diaphragm 15 is damaged.Prevent oil from entering the external pipeline and contaminating the liquid in the external pipeline.

[0021] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device that performs control such as a computer.

[0022] When in use: connect the water inlet pipe 21 and the water outlet pipe 27 to the external pipe, start the drive motor 6, so that the shaft 7 rotates, the turntable 8 and the slider 9 rotate along the circular slide rail 10, the transmission rod 11 moves and flips, and the connecting rod 12 and the piston 14 move back and forth, continuously squeezing the oil in the oil chamber 4, so that the oil continuously squeezes the column 17, so that the column 17 continuously squeezes the diaphragm 15, thereby continuously changing the volume of the working chamber 5, so that the liquid passes through the water inlet pipe 21 and the water inlet. The one-way valve 22 enters the working chamber 5, then enters the safety pipe 23, and then enters the external pipeline from the water outlet pipe 27 through the water outlet one-way valve 28. When the pressure in the oil chamber 4 is detected to be abnormal by the pressure gauge 19, it indicates that the diaphragm 15 is damaged, so that the alarm 20 is activated, and the alarm 20 sounds an alarm. At the same time, the electric push rod 24 is activated, so that the blocking plug 26 and the movable rod 25 move to the left until the blocking plug 26 moves to the left to the appropriate position, thereby blocking the liquid and oil flowing into the safety pipe 23.

[0023] To sum up, the plunger metering pump can detect the pressure change in the oil chamber 4 through the pressure gauge 19. When the pressure in the oil chamber 4 is detected to be abnormal, it indicates that the diaphragm 15 is damaged, so that the alarm 20 is activated, and the alarm 20 sounds an alarm. At the same time, the moving component drives the blocking plug 26 to move to the left to a suitable position, thereby blocking the liquid and oil flowing into the safety pipe 23, so that the staff can be reminded in time that the diaphragm 15 is damaged. When the diaphragm 15 is damaged, the oil can be blocked in time to prevent the oil from entering the external pipeline and contaminating the liquid in the external pipeline, thereby solving the problems raised in the above-mentioned background technology.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plunger metering pump, comprising a transmission box (1), characterized in that: A pump body (2) is fixedly installed on the left side of the transmission box (1), an active chamber (3) is provided inside the pump body (2), an oil chamber (4) is provided inside the pump body (2), and a working chamber (5) is provided inside the pump body (2). A driving assembly is provided inside the transmission box (1), and a connecting rod (12) is provided inside the transmission box (1) through the driving assembly. A fixed block (13) is slidably connected to the surface of the connecting rod (12), and the fixed block (13) is fixedly connected to the active chamber (3). A piston (14) is fixedly installed on the left end of the connecting rod (12), and the working chamber (5) is provided with a diaphragm (15) inside, a pressure gauge (19) is fixedly installed on the top of the pump body (2), a detection probe on the pressure gauge (19) extends into the oil chamber (4), an alarm (20) is fixedly installed on the top of the pump body (2), a water inlet assembly is provided on the top of the working chamber (5), a safety pipe (23) is fixedly installed on the bottom of the working chamber (5), a moving assembly is provided inside the safety pipe (23), a blocking plug (26) is provided inside the safety pipe (23) through the moving assembly, and a water outlet assembly is provided at the bottom of the safety pipe (23).

2. A plunger-type metering pump according to claim 1, characterized in that: The driving assembly comprises a driving motor (6) arranged on the top of a transmission box (1); a rotating shaft (7) is fixedly installed on the output end of the driving motor (6); a rotating disk (8) is fixedly installed on the bottom end of the rotating shaft (7); a slider (9) is fixedly installed on the top of the rotating disk (8); a circular slide rail (10) is slidably connected to the surface of the slider (9), and the circular slide rail (10) is fixedly connected to the transmission box (1); a driving rod (11) is hingedly connected to the bottom of the rotating disk (8); and the driving rod (11) is hingedly arranged with a connecting rod (12).

3. A plunger-type metering pump according to claim 1, characterized in that: The water inlet assembly comprises a water inlet pipe (21) arranged at the top of the working chamber (5), and a water inlet one-way valve (22) is provided on the water inlet pipe (21).

4. A plunger-type metering pump according to claim 1, characterized in that: The moving assembly comprises an electric push rod (24) and a movable rod (25) arranged inside the safety tube (23); the output end of the electric push rod (24) is fixedly connected to the blocking plug (26); the movable rod (25) is slidably connected to the safety tube (23), and the movable rod (25) is fixedly connected to the blocking plug (26).

5. A plunger-type metering pump according to claim 1, characterized in that: The water outlet assembly comprises a water outlet pipe (27) arranged at the bottom of the safety pipe (23), and a water outlet one-way valve (28) is arranged on the water outlet pipe (27).

6. A plunger-type metering pump according to claim 1, characterized in that: A mounting plate (16) is provided inside the oil chamber (4), a column (17) is slidably connected inside the mounting plate (16), a spring (18) is fixedly mounted on the surface of the column (17), and the spring (18) is fixedly connected to the mounting plate (16).

7. A plunger-type metering pump according to claim 2, characterized in that: There are multiple sliders (9), and the multiple sliders (9) are distributed in a circular array.

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